Printing-press protector.



No. 675,129. Patented May 28, IBM. T. C. DEXTER.

PRINTING PRESS PROTECTOR.

(Application filed Aug. 29, 1900.) (No Model.) 6 Sheats -Sheet l.

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No. 675,|29. Patented May 28, l90l. T. C. DEXTER.

PRINTING'PRESS PROTECTOR.

(Application file Aug. 29, 1900.) (No Model.) 6 Sheets-Sheet 2.

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ATTORNEY no. 675,129. Patented May 28, mm.

T. c. DEXTER.

PRINTING PRESS PROTECTOR.

(Application filed Aug. 29, 1900.)

(No Model.) 6 Shuts-Sheet 3.

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No. 675,l29. Patented May 28, l90l. T. C. DEXTER.

PRINTING PRESS PROTEGTOR.

(Application filed Aug. 29, 1900.) (No Model.) 6 Sheets-Sheet 4.

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m: nouns mm 00.. mac-mum. Wuulum'nfl. n. c.

' Patented May 28, I901. T. 0. DEXTER.

PRINTING PRESS PROTECTOR.

(Application filed Aug. 29, 1900.) (No Model.)

6 Sheets-Sheet 5.

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No. 675,I29. Patented May 23, mm. T. 0. DEXTER.

PRINTING PRESS PROTECTOR.

(Application flied Aug. 29, 1900. (No Model.) 6 Sheets-Sheet 6.

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FFICE.

TALBOT C. DEXTER, OF PEARL RIVER, NEW YORK.

PRINTING-PRESS PROTECTOR.

SPECIFIClATION forming part of Letters Patent No. 675,129, dated May 28, 1901.

Application filed August 29, 1900. Serial No. 28,406- (N0 model-l automatically from a feeder connected to the feed-board of the press and deliver the printed paper from the front of the impressioncylinder by means of fingers, which strip the paper from the impression-cylinder and guide it either onto'a fly or traveling tapes.

The chief object of the invention is to guard more effectually against clogging the printing-press incident to the entanglement of the paper by the advance edge thereof becoming accidentally caught on the ends of the usual paper guiding ordelivering fingers, which are arranged to strip the printed paper from the impression-cylinder; and to that end the invention consists, essentially, in the combination, with a printing-press stop mechanism for arresting the motion of said press and paper-guiding fingers disposed to receive the paper from the impression-cylinder, of vertically-yieldin g feelers extending lengthwise of said fingers and sustained over the same normally in proximity to the planethereof and controlling the stop mechanism by vertical movement of the feelers incident to the buckling of the paper entering between said feelers and guiding-fingers; and the invention also consists in novel features of its details, as hereinafter described and claimed.

Referring to the annexed drawings, Figure 1 is aside elevation of a printing-press equipped with my improved protecting devices. Fig. 2 is an enlarged side'view showing more fully the connectionof the protecting devices with the stop mechanism of the printing-press. Fig. 3 is a plan view of the same. Fig. 4 is an enlarged side View of the protecting devices in their positionsw'hen the feeder and printing-press areboth in perfect operating condition. Fig. 5. is a plan view of the same. Fig. 43 is a vertical transverse section on line X X in Fig. 4, viewed in the direction of the arrow. Fig. 7 is a side View showing the protecting devices at the delivery of the press in position for arresting the actuating mechanism of the press and feeder. Fig. 8 is a further enlarged reversed side View of the detent whichis actuated by the aforesaid protecting devices. Fig. 9 is a side view of the protecting devices controlled electrically; and Fig. 10 is an .enlarged elevation taken at Y Y, Viewed in the direction of the arrow shown thereat.

Similar characters of reference indicate corresponding parts.

In said drawings, A represents the impression-cylinder of the species of printing-presses usually termed front-delivery presses.

B represents a paper-feeding machine,which is only partly shown and may be of any suitable construction.

0 denotes the feed-board, over which the paper is carried from the feeder B to the impression-cylinder A by means of traveling tapes a.

1) represents the usual fingers which strip the printed paper from the impression-cylinder and deliver it onto the fly D in the usual and well-known manner.

c represents the main drivingshaft, on which are mounted the driving-pulley E and loose pulley E, and also a gear-wheel H, which by means of an intermediate gear J imparts rotary motion to a gear I on the shaft of the impression-cylinder.

G denotes the driving-belt, and F the usual belt-shifting lever.

The stop mechanism for automatically actuating the lever F to shift the belt G from the tight pulley E onto the loose pulley E is arranged in a protecting-case K and consists of a horizontal shaft 2, supported in bearings in the sides of the case K and having fastened to it a gear-wheel 3, which receives rotary motion from the gear J by means of a suitable train of gears, as indicated by dotted lines 4, 5, 6, and 7 in Figs. 1 and 2 of the drawings. On the shaft 2 is also mounted a cam 8, facing a roller 9, jonrnaled on a stud projecting from the side of a lever 10, which is pivoted at its lower end to a suitable stationary support and is connected by a rod 11 to a bellcrank 12, one arm of which is connected bya rod 13 to a horizontal extension of the beltshifting lever F. The lever 10 is forced toward the cam 8 by means of a spiral spring 14, abutting with one end against the inner face of the adjacent end wall of the ease K and with the opposite end against a collar 15, adjustably attached to the rod 11. The action of the spring 14 throws the lever 10 into a position which causes the lever F to shift the belt G from the driving-pulley E to the loose pulley E. The cam 8 forces the lever 10 in opposition to the spring 14, and thereby causes the lever 1 to shift the belt onto the driving-pulley E.

In order to maintain the belt on the lIlV-r ing-pulley while the cam 8 is turned from the lever 10, an arm 16 is secured at one end to a rock-shaft 17 and has its opposite end carried intermittently to a position to engage a shoulder 18 on the lever 10, and thereby retain said lever in the position to which it is forced by the cam 8. The arm 16 is actuated by another arm 20, attached to the rock-shaft 17 and having pivoted to its free end a roller, which is directly over a cam 19, secured to the rotary shaft 2.

The action of the arm 18 is controlled automatically by my improved devices, actuated by the paper in transit to and from the impression-cylinder A. These controlling devices consist of two pairs or sets of instruments. One of said pairs is located directly over the delivery end of the feed-board O and the other pair is placed at the delivery end of the impression-cylinder A.

The instruments at the delivery end of the feed-board are employed to automatically arrest the actuating mechanism of the printingpress in case the feeding-machine B fails to deliver the paper to the impression-cylinder at the proper time.

The action of the feeding-machine is stopped simultaneously owing to its deriving motion from the shaft 2, to which is attached a gear 21, meshing with a gear 22 on a counter-shaft 23, to which is also attached a miter-gear 24:, engaging a similar gear 25, fastened to a shaft 26, which is extended to the base of the feeding-machine B, where it is provided with a miter-gear 27, engaging a corresponding gear 28 on the lower end of a vertical shaft 29, supported in suitable bearings on the frame of the feeding-machine.

To the upper end of the shaft 29 is attached a miter-gear 30, meshing with a similar gear 31 on one of the shafts of the feeding-machine.

To the top of the delivery end of the feedboard 0, at the side edges thereof, are mounted brackets d (I, provided with longitudinal grooves 61, in which are adjustably secured plates 6 by means of bolts 6, passing through said plates and through longitudinal slots 6 in the brackets, as shown in Fig. 4 of the drawings. Said adjustability is required to allow the controlling instruments to be placed in proper position in relation to the line of the usual feed-gages c of the press.

The plates 6 are formed with bearings e in which are mounted the ends of a transverse shaft f, which receives an intermittent rocking motion by means of an arm f, attached to one end of said shaft and connected at its free end by a rod f to the arm 20, which is periodically lifted by the cam 19. The down ward movement of said arm is produced by gravity of said arm and other devices attached to the shaft f, as hereinafter described. To the shaft f are also attached two forwardlyextending arms f disposed equidistant from the longitudinal central line of the feed-board and having on their free ends lateral projections f Under one of said projections of each of the arms f is a detecting-finger g, which is pivoted at a short distance above the center of its length to an arm g, fastened to a rod 9 which extends across the feed-board and is secured at its ends to the plates 0. The fingers g normally rest with their lower ends on the feed-board and have their upper ends under one of the projeetionsf of each arm f and thus prevent said arm from rocking. Said position is assumed by the fingers when the feeding-machine fails to deliver paper to the impression-eylinder, and, inasmuch as the aforesaid stopping of the armsf prevents the shaft ffrom rocking, the arm f on the end of said shaft is caused to retain the arm 20 inc its elevated position, to which it has been lifted by the cam 19. The other arm 16, which I designate the detaining-arm, moving in unison with the arm 20, is thus likewise retained in its elevated position and prevented from engaging the shoulder 18 on the lever 10, while the cam 8 is turned from said lever. The release of said lever from the detainingarm 16 allows the spring 14 to throw said lever to a position which causes the lever F to shift the belt from the driving-pulley onto the loose pulley, and thus stop the motion of both the press and feeder The fingers g are thrown out of their aforesaid normal position by the paper passing from the feed-board to the impression-cylinder and tilting said fingers so as to prevent the shoulders or lateral projections f of the arms f from coming in contact with the tops of the fingers g, as shown in Fig. t of the drawings. This allows free movement of the rock-shaft fand properly-timed movement of the'detaining-arm 16, so as to engage the shoulder 18 on the lever 10 and hold said lever in the position to which it has previously been forced by the cam 8. Consequently the feeder and press continue to operate as long as the feeder properlydelivors the paper to the impression-cylinder.

'lo guard against buckling of the front edge -of the paper by contact with the fingers g, suitable paper-depressors h are arranged at opposite sides of and in proximity to the fingers. Said depress rs are preferably formed of light flexible plates secured at their rear ends to brackets h, fastened to the rod g the free ends of said plates normally resting on the feed-board.

To hold the lower ends of the fingers 9 out of contact with the paper while being drawn onto the impression-cylinder by the usual grippers thereof, I attach to each of said fingers, preferably at. the pivot thereof, a rearwardly-extending pedal 9 and fasten to each of the rock-arms f a leg M, which during the descent of the rock-arm strikes the pedal 9 and thereby tilts the finger 9 beyond the po sition into which it is thrown by the passage of paper underneath it.

h represents a stop attached to the stationary arm g to limit the movement of the finger g in returning to its normal position.

A further protection of the impression-cylinder is obtained from the controlling instruments located at the delivery of the impression-cylinder, as hereinbefore stated. These latter instruments are arranged at or near the same distance from the central line of the travel of the paper as the before-described instruments located over the feed-board and are constructed as follows, to wit:

Over the rear ends of the paper-guiding fingers b is a rod 0, which extends horizontally across the press and is fastened at its ends to arms N, extending upward from the pressframe. To the rod 0 are fastened two brackets P, to each of which is pivoted an upwardlyextending arm I. 'To the lower end of this arm is fastened the feeler 1', formed, preferably, of a thin metal strip extending from the arm I downward nearly to the rear end of the subjacent finger b, where it is bent forward, so as to extend lengthwise of said finger and lie normally parallel with and in proximity to the top of the finger, leaving merely sufficient space between them to allow a flat sheet of paper to pass over the finger. A set-screw t" or other suitable adjustable stop, suitably supported on the bracket P, sustains the feeler 2' in its aforesaid normal position.

To the upper end of the arm I is pivotally connected a bar j, which extends to the stationary arm g, sustained on the bracket d, as hereinbefore described. From the side of the arm g projects a guide 1, which may consist of a roller pivoted on a pin projecting from the arm g. On this guide rides the free end of the barj, on which is mounted a prop Z, of proper height and disposed to pass directly underone of the lateral projections f of the rock-arm f 3 when said arm is in its elevated position.

The operation of the feeler 2' is as follows: In case the printed paper issuing from the impression cylinder becomes accidentally caught and entangled on the ends of the guide-fingers b or on the ends of the fly-fingers, as represented in Fig. 7 of the drawings, said paper becomes buckled and is liable to form a wad which clogs the press. This is obviated by the Vertically-yielding feelers vi, which are lifted by the buckled paper entering between said feelers and subjacent guidefingers I). Said lifting of the feelers causes the arms I to push the bars j toward the stationary arms g a sufficient distance to carry the props Z to a position directly under the lateral projections f of the rock-arms f which are thereby prevented from descending. The resultant stopping of the rock-shat t fprevents the detaining-arm 16 from dropping into a position toengage the shoulder 18 on the lever 10, which is thereby allowed to actuate the lever F to shift the belt from the driving-pulley onto the loose pulley, and consequently stop the motion of the press and feeder.

I do not limit myself to the use of the barj for carrying the prop Z to and from a position to arrest the movement of the rock-arm f inasmuch as said prop may be moved to and from the aforesaid position by means of electromagnetic devices controlled by the movement of the feeler t. An exemplification of such modification of my invention is illustratedin Figs. 9 and 10 of the drawings, in which n and 11. represent the two poles of an electric circuit maker and breaker. The pole at is connected to the upwardly-extending arm I of the feeler 2', and the other pole at is connected to a suitable stationary support and in position to be normally out of contact with the pole n and to make contact therewith when the feeler 1} is lifted, as shown, thus closing the circuit when the paper in transit from the impression-cylinder to the fly becomes accidentally buckled.

'l denotes an electromagnet suitably supported on the stationary arm g and facing an armature .9, attached to the prop Z, which is pivoted to an extension of the arm g, as shown at t. A weighted arm 11., attached to the foot of the prop, holds said prop normally retreated from under the lateral projection f of the rock-arm f and away from the magnet T when deprived of electric energy. A stop 0 serves to limit the said retreat of the prop.

In case the printed paper becomes buckled on the fingers b the feeler 11 is lifted by said paper, as hereinbefore described. Thismovement of the feeler closes the circuit and causes the energized magnet r to draw the prop Z to a position to arrest the movement of the rockarm f and thereby stop the motion of the press and feeder in the manner as already herein described.

I claim- 1. The combination with a printing-press and stop mechanism for arresting the motion of said press, of paper-guides disposed to receive upon them the paper in transit, and vertically-yielding feelers extending lengthwise of said guides, in proximity to the plane thereof and controlling the stop mechanism by the lifting of the feelers incident to the buckling of the paper entering between said guides and feelers.

2. The combination with a printing-press, stop mechanism for arresting the motion of said press, and paper-guidin g fingers disposed to receive the paper from the impression-cylinder, of vertically-yielding feelers extending lengthwise of said fingers and sustained over the same normally in proximity to the plane thereof and controlling the stop mechanism by vertical movement of the feelers incident to the buckling of the paper entering between said feelers and guiding-fingers as set forth.

3. The combination with a printing-press, stop mechanism for arresting the motion of said press, and paper-guiding fingers disposed to receive the paper from the impression-cylinder, of rock-arms controlling the stop mechanism, vertically-yielding feelers extending lengthwise of the guiding-fingers and sustained over the same normally in proximity to the plane thereof and in position to belifted by the accidental buckling of the paper under said feelers, and detents movable to and from a position to arrest the action of the aforesaid rock-arms and controlled by the aforesaid feelers as set forth.

4. The combination with a printing-press, stop mechanism for arresting the motion of said press,and paper-guiding fingers disposed to receive the paper from the impression-cylinder, of rock-arms controlling the stop mechanism, vertically-yielding feelers sustained normally parallel with and in proximity to the plane of the guiding-fingers, longitudinally-movable bars actuated by said feelers, and props carried on said bars to and from a position to arrest the movement of the aforesaid roek-arms as set forth.

5. The combination with a printing-press, stop mechanism for arresting the motion of said press and paper-guiding fingers disposed to receive the paper from theimpression-cylinder, of rock-arms controlling the stop mechanism, vertically-yielding feelers sustained normally parallel with and in proximity to the plane of the aforesaid guiding-fingers, arms extending from the feelers, bars extending from said arms to the aforesaid rockarms, guides supporting the free ends of said bars, and props mounted on said bars and carried thereby to and from a position to arrest the movement of the rock-arms as set forth.

6. The combination with a printing-press, stop mechanism for arresting the motion of said press,and paper-guiding fingers disposedto receive the paper from the impression-cylinder, of a stationary rod disposed transversely above the plane of the guiding-fingers, brackets secured to said rod, arms pivoted to said brackets, feelers extending from said arms lengthwise of the guide-fingers and sustained normally parallel with and in proximity to the plane of said fingers, rock-arms controlling the aforesaid stop mechanism, guides under said rock-arms, bars connected at one end to the arms of the feelers and supported at their free ends on the aforesaid guides, and props mounted on the free ends of said bars and carried thereby to and from a position directly under the free ends of the aforesaid rock-arms as and for the purpose set forth.

7. The combination with a printing-press, automatic paper-feeder, the feed-board, conveyers delivering the paper from the feeder to the impression-cylinder, paper-guiding fingers disposed to receive the paper from the impression-cylinder, and stop mechanism for arresting the motion of the press and feeder, of rock-arms over the delivery end of the feed-board and controlling the stop mechanism, detecting-fingers pivoted intermediate their ends and sustained with their lower ends normally on the feed-board and with their upper ends directly under the free ends of the aforesaid rock-arms to arrest the movement of said arms by the failure of the paper passing to the impression-cylinder,verticallyyielding feelers extending lengthwise of the aforesaid paper-guiding fingers and sustained over the same normally in proximity to the plane thereof and to be lifted by the accidental buckling of the paper under said feelers, and detents movable-to and from a position to arrest the action of the aforesaid rockarms and controlled by said feelers as set forth.

8. The combination with a printing-press, automatic paper-feeder, the feed-board, conveyers delivering the paper from the feeder to theimpression-cylinder,paper-guidingfingers disposed to receive the paper from theimpression-cylinder, and stop mechanism for arresting the motion of the press and feeder, of rock-arms over the delivery end of the feedboard and controlling the stop mechanism, arms sustained stationary under said rockarms, detecting-fingers pivoted to the sta- .tionary arms and sustained with their lower ends normally on the feed-board and simultaneously with their upper ends directly under the free ends of the rock-arms, astationary rod disposed transversely above the plane of the aforesaid paper-guiding fingers, brackets mounted on said rod, arms pivoted to said brackets, feelers extending from said brackets lengthwise of the aforesaid paper-guiding fingers and sustained normally parallel with and in proximity to the plane of said fingers, bars extending from the arms of the feelers to the aforesaid rock-arms, guides on the stationary arms supporting the free ends of said bars, and props mounted on said bars and carried thereby to and from a position to arrest the action of the rock-arms as set forth.

9. The combination with the automatic paper-feeder, feed-board, conveyers delivering the paper from the feeder, stop mechanism for arresting the action of the feeder, and rock-arms controlling said stop mechanism, of stationary arms under said rockarms, detecting-fingers pivoted intermediate their ends to said stationary arms and sustained with their lower ends normally on the feed-board, and simultaneously with their upper ends under the free ends of the rock-arms,

IIO

and paper-depressors adjacent to the lower ends of said detecting-fingers as set forth.

10. The combination with the automatic paper-feeder, feed-board, conveyers delivering the paper from the feeder, stop mechanism for arresting the action of the feeder, and rock-arms controlling the stop mechanism, of stationary arms under the rock-arms, detecting-fingers pivoted intermediate their ends to the stationary arms, stops limiting the movement of said fingers, at a position directly under the rock-arms, and paper-depressors adjacent to the lower ends of said detecting-fingers as set forth.

11. The combination with the feed-board, the rock-arm and pivoted detecting-finger disposed over the feed-board and controlling said rock-arm, of a pedal extending from said finger, and a leg attached to the rock-arm and disposed to strike the pedal of the finger during the descent of the rock-arm and thereby tilt said finger out of the path of the paper as set forth. 1

TALBOT O. DEXTER. 

